<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
  <title>08-函数进阶</title>
  <style type="text/css">
  * {
    padding: 0;
    margin: 0;
  }

   #bnt1 {
      position: absolute;
    }
  </style>
</head>
<body>
  <div id="box" class="box">
    <button id="bnt1" message="后盾人">button</button>
  </div>
  <script src="index.js"></script>
  <script type="text/javascript">
  
  </script>
</body>
</html>